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• Customizing the windows server 2008 RDP login screen possible?

  - by moontear

  Hi, I'm working with RDP sessions quite frequently. As we work in teams and all use the same user account on a particular computer (I know...) I was wondering if there was a way to display from which computer (hostname, computername) the person is connecting. The login screen I get when two users are already connected looks like this (german): I'd love it, if the screen would display from where the logged in user is connecting e.g. "COMPUTER\user connected from MYCOMPUTERNAME". This way I would know whom to ask to disconnect so I can hop onto the session. If I remember correctly the login screen looked different for previous Windows versions including this connection information. Any way I can easily enable this or is this just standard windows behavior and there is no way to tell from where the user is connecting (btw: Task Manager shows the computername of the connected user).

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• convert serveral image files to a single djvu file

  - by user62046

  Suppose I have serveral BMP image file, say 001.bmp, 002.bmp,..., 100.bmp. I want to convert these files to a single djvu file, whose first page is the content of 001.bmp, the second page is the content of 002.bmp...etc. What is the best way (software) to do this task? I don't want to upload those image file to a server, since it takes too much time. On the other hand, I am not restricted to use BMP files, I can also work with PNG or JPG files.

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• Linux - How to run Firefox with AT command

  - by conualfy

  I try to run a specified command on a desired time. I found at for this, and it seems to work fine if I run: echo "ls -al / > /home/florin/test.txt" | at 4:21am But I want to run a different thing: /usr/bin/firefox -new-tab http://google.ro I tried adapting the first line with my action (running it in terminal opens a new Firefox tab with http://google.ro, so the command is correct), but with at, it does not work: echo "firefox -new-tab http://google.ro" | at 4:23am The task seems to be scheduled, but it does not run. When running the previous line I get the default reply from at: warning: commands will be executed using /bin/sh Should my Firefox command be differently run in sh? Is there a way to do my action with at, or some other way? Thanks a lot!

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• Seeking free project planner with auto resource levelling

  - by mawg

  As the title says, I am seeking a project planner with automatic resource levelling. It must be free for commercial use and a bonus, but not requirement, would be MS project import/export. I like the look of Task Juggler, but it is at a stage of development hovering between v2 and v3. Anything else? Basically, I want to play "what if games" - I will determine the tasks and their effort, and the dependencies between them and then try to figure out how many staff I need. Since many of the tasks can be done in parallel, it is difficult to guess how many are needed. A PM tool with automatic resource levelling seems like a good way to find out.

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• Clear / Flush cached memory

  - by TheDave

  I have a small VPS with 6GB RAM hosting a couple of websites. Recently I have noticed that my cached memory size is quite high - see below: Cpu(s): 0.1%us, 0.1%sy, 0.0%ni, 99.1%id, 0.0%wa, 0.2%hi, 0.4%si, 0.0%st Mem: 6113256k total, 5949620k used, 163636k free, 398584k buffers Swap: 1048564k total, 104k used, 1048460k free, 3586468k cached After investigating if there is some method to have this flushed or cleared I stumbled upon a command which is: sync; echo 3 > /proc/sys/vm/drop_caches I read it could be useful to add this to a chron-task/job. Is this method recommended or could this lead to potential problems? The only concern I have is that I use one Magento installation on Memcached - could this have any negative effects on it? I am certainly not a pro therefore I would very much appreciate some expert advise. PS: My VPS runs on CentOS 5 x64 and I have WHM + NGINX installed.

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• How to prevent mod_cluster as single point failure?

  - by Hitesh

  In my configuration i used Apche+mod_cluster as a front_end(load balancer) server and two JBOSS AS 7.1.0 as backend server. In my configuration on one system i have install Apache+mod_cluster + JBOSS AS 7.1.0 and on other system JBOSS AS 7.1.0. Both JBOSS AS 7.1.0 are in domain mode means in clustering. My problem is that if Apche+mod_cluster crash than client can not access any JBOSS AS . I want to configure Apache+mod_cluster in Master_Slave format, means if one of Apache+mod_cluter down another Apache+mod_cluster become active and pass client(browser) request to back-end server in normal form without any interruption. Is there any way to make two Apache+mod_cluster to communicate with each other , means to check health status of each other and if any one get down other Apche+mod_cluster will do it's task ......

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• Hang while starting several daemons

  - by Adrian Lang

  I’m running a Debian Squeeze AMD64 server. Target runlevel after boot is runlevel 2, which includes rsyslogd, cron, sshd and some other stuff, but not dovecot, postfix, apache2, etc. The system fails to reach runlevel 2 with several symptoms: The system hangs at trying to start rsyslogd Booting into runlevel 1 works, then login from the console works Starting rsyslogd from runlevel 1 via /etc/init.d/rsyslog hangs Starting runlevel 2 with rsyslogd disabled works But then, logging in via console fails: I get the motd, and then nothing Starting sshd from runlevel 1 succeeds But then, I cannot login via ssh. Sometimes password ssh login gives me the motd and then nothing, sometimes not even this. Trying to offer a public key seems to annoy the sshd enough to not talk to me any further. When rebooting from runlevel 1, the server hangs at trying to stop apache2 (which is not running, so this really should be trivial). Trying to stop apache2 when logged in in runleve 1 does hang as well. And that’s just the stuff which fails all the time. RAM has been tested, dmesg shows no problems. I have no clue. Update: (shortened) output from rsyslogd -c4 -d called in runlevel 1 rsyslogd 4.6.4 startup, compatibility mode 4, module path '' caller requested object 'net', not found (iRet -3003) Requested to load module 'lmnet' loading module '/user/lib/rsyslog/lmnet.so' module of type 2 being loaded conf.c requested ref for 'lmnet', refcount 1 rsylog runtime initialized, version 4.6.4, current users 1 syslogd.c requested ref for 'lmnet', refcount now 2 I can kill rsyslogd with Strg+C, then. /var/log shows none of the configured log files, though. Update2: Thanks to @DerfK I still have no clue, but at least I narrowed down the problem. I’m now testing with /etc/init.d/apache2 stop (without an apache2 running, of course) which hangs as well and looks like an even more obvious failure. After some testing I found out that a file with one single line: /usr/sbin/apache2ctl configtest /dev/null 2&1 hangs, while the same line executed in an interactive shell works. I was not able to further reduce this line while, i. e. every single part, the stream redirections and the commando itself is necessary to reproduce the hang. @DerfK also pointed me to strace which gave a shallow hint about what kind of hang we have here: wait4(-1for the init scripts futex(0xsomepointer, FUTEX_WAIT_PRIVATE, 2, NULL for rsyslogd / apache2 binaries called by the init scripts The system was installed as a Debian Lenny by my hoster in autumn 2011, I upgraded it to Squeeze immediately and kept it up to date with Squeeze, which then used to be testing. There were no big changes, though. I guess I never tried to reboot the system before.

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• Rules to choose hardware for OLTP systems (sql server)

  - by Roman Pokrovskij

  Ok. We know database size, number of concurrent users, number of transactions per minute; should choose number of processors, RAID, RAM, mirroring and clustering. There are no exact rule.. but may be there are no rules at all? In my practice in every case I have "legacy" system, and after some inspections and interview I can form an opinion how hardware and design can be improved. But every time when I meet "absolutely" new system (I guess there are no new systems, but sometimes are such tasks) I can't say anything trustful. So I'm interesting how people deal with such tasks? They map task on theirs experience or have some base formulas?

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• Text tagging/analysis tool for Mac

  - by Mark Porter

  I'm a doctoral student doing research in the humanities. As part of my research I have gathered together a lot of interview text. To analyse this data I want to be able to easily tag sections of text with keywords (the tags need to be able to overlap, and perhaps be organised hierarchically) and later be able to collate those sections from across multiple files. I need to be able to do this on a Mac. It feels like a simple task but I can't find any software for doing it that isn't either horribly clunky or a massive overkill worth hundreds of pounds. Is there any good software for doing this, or are there any good ways of doing it with other software?

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• Kiosk view of remote machine X11vnc

  - by Swapnil

  I need to connect to a remote machine through vnc viewer applet embedded in a webpage. The remote machine will host a program running on the desktop connected through the viewer. I need to enable the viewers to view only the running application program without access to any other feature such as the desktop and/or the task bar. How can I achieve this? BTW, I am experimenting with x11vnc -id, -sid command options, but got no desired view. Please help as I am in a bit urgency.

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• Setting affinity on windows server 2003

  - by Samuel

  I have a program that by default only runs on one CPU. I have tried using the start /affinity x notepad.exe batch command but i can't get it to run my program. it changes the title of the command line window but doesn't execute the program. this start command does work for notepad so it might just be a problem with the software. I have set the affinity manually via task manager so i know it works. I am not the programmer of this software so changing that is not an option.

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• Unlock file on Windows Server 2003 by remote desktop without rebooting

  - by BalusC

  We've several Windows Server 2003 machines running, each with its own purposes. There are scheduled jobs which synchronizes some files over SFTP using WinSCP. Very sometimes a newly copied file is left locked in the "inbox" folder without any reason. The machine's own background task (programmed in Java) can't move it to the "processed" folder anymore after processing it. Manually moving it only yields the well known error message Cannot move [filename]: it is being used by another person or program. The only resort is to reboot the machine, but we would of course like to avoid that. Any suggestions? I tried Unlocker which works fine locally at WinXP, but doesn't work at those Win2K3 machines by remote desktop (unlock option doesn't show up in rightclick context menu). I tried Process Explorer as well as described in this blog article, but it caused the server to crash (not sure if that's because it's executed through remote desktop).

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• Excel Pivot Tables -- Divide Numerical Column Data into Ranges

  - by ktm5124

  Hi, I have an Excel spreadsheet with a column called "Time Elapsed" that stores the number of days it took to complete a task. I would like to make a pivot table out of this spreadsheet where I divide the "Time Elapsed" column into ranges, e.g., how many tasks took 0 to 4 days to complete how many tasks took 5 to 9 days how many took 10 to 14 days how many took 15+ days Do I have to create new columns in my spreadsheet dedicated to each interval (0 to 4, 5 to 9, etc.) or can I use some feature of pivot tables to separate my one "Time Elapsed" column into intervals? Thanks in advance.

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• Windows 7 Taskbar disappears overnight

  - by eidylon

  Hello all, I've got this problem that started happening recently. Overnight, something is happening that makes my taskbar disappear on my laptop. The Start orb is still there, and if I click it, it pops up the start menu, but the whole rest of the taskbar, including the background behind the start orb, is just completely vanished: tray icons, running programs, clock, everything. I tried killing explorer.exe and restarting it, but it doesn't restart. And after killing it, Task Manager won't let me start ANY programs. It gives no errors, just ... doesn't run them. Anyone else see this or know what it might be? I'm running Windows 7 RC on an IBM ThinkPad R51 with 2GB ram.

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• How to set the IP address in a customized OpenWRT compilation

  - by Berdus

  I have been struggling today customizing OpenWRT. I checkout the stable using SVN, "make menuconfig" to customize the image, "make" it and run it on a router. Almost all my modifications work, except for the (Seemingly trivial) task of changing the default 192.168.1.1 address. I tried numerous files (scripts as well as config files) but I can't seem to change it (I can change it for a brief moment after boot using the "preinit" file, but after a few seconds it reverts to default). I suspect I should be setting it in the /etc/network file, but modifications there seem to be overwritten during boot. Maybe it has something to do with the br-lan interface? Does anybody have some thoughts on the subject? Thanks!

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• How to Setup Ubuntu Mail Server with Google Apps?

  - by Apreche

  I have a domain, let's call it foobar.com. All of the MX records for foobar.com point to Google's mail servers because I am using Google Apps for your domain to manage it. It's great because everyone gets all the advantages of GMail, but our e-mail addresses aren't @gmail.com. I also have a server. Primarily, it's a web server, but it also serves other things. One of the things it serves is the web site for foobar.com and also sites for various virtual hosts such as shop.foobar.com and forum.foobar.com. The server is running Ubuntu 8.04, because I like using LTS releases in production. The thing is, there are various applications running on the server that need the ability to send out emails. Various applications, like the cron jobs, send me e-mails in case of errors. Some of the web applications need to send e-mail to users when they forget their passwords, to confirm new registered users, etc. Lastly, it's nice to be able to send e-mail from the command line using the mail command, or mutt. How can I setup the mail on the web server to go through the Google apps mail servers? I don't need the web server to receive mail, though that would be cool. I do need it to be able to send mail as any legitimate address @foobar.com. That way the forum application can send mails with [email protected] in the from field, and the ecommerce application will have [email protected] in the from field. Also, by sending the mail through the Google servers, we can avoid a lot of the problems with the e-mails being blocked by various spam filters on the web. Google's SMTP servers are trusted a lot more than mine would be. I'm pretty good with administering Linux systems, but I am absolutely brain dead when it comes to e-mail. I need step by step directions from beginning to end on how to set this up. I need to know every thing to install, and every single change to the configuration files that is necessary. I have tried following various howtos and guides in the past, but none of them were quite right. Either they didn't work at all, or they offered a configuration that is not what I wanted. Please help. Thanks.

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• how to separate a network for traffic

  - by Student_CVO

  At the moment our all computers in one big LAN, it is the intention to separate the admin and edu (it's in a school) especially for traffic and less for security. How do this best? I have a drawing, but can't post it (a can send it in a mail) Firewall?, VLAN?, IPCop (no two green zones)?, pfsense? ... Should there be two scopes on the dhcp server (WIN 2008 R2), one for admin and one for edu or is one scope enough? I would like your advice, I am a student in training with this task as a project. Thanks

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• SQL 2008 Memory Usage

  - by Danilo Brambilla

  I have a SQL Server 2008 (ver 10.0.1600) running on a Windows Server 2008 R2 Enterprise server with 8 GB of physical ram. If I open Task Manager I can see on 'Physical Memory' section of 'Performance' tab that only 340 MB are Available of 8191 Total, but I can't see any process using such amount of memory. Please note SQL Server is memory limited to 6GB (Maximum Server Memory = 6000). If I open Sysinternals Process Explorer, I can see sqlsrvr.exe process has: Private Bytes: 227.000 K Working Set: 140.000 K Virtual Size: 8.762.000 K What does this means? Is there any way to free up this memory for other process? Why Virtual Size figure as allocated memory? I thought that Virtual Size was 'reserved memory' only.

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• Invoking an MMC Snap-in function from Windows command shell: is it possible?

  - by robob

  Sorry for the cross post on Superuser, but I cannot see any answer to my question, so I try to ask the same question here. I need to execute a MMC Snap-in function from the Command Shell of a Windows computer. I need it to schedule this command in the same Windows PC and executes in background. Probably this questions could seem a little bit strange but I have a program that creates a debug log only through its MMC Snap-in console. And I need to automatise this task to programatically read this log! Dows anyone know how to do this? thanks

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• bind udp problem

  - by mascix

  I am using bind 9.6.1 and about 2 days ago I realized that there is a bug at bind for windows platform. when server gets "UDP client handler shutting down due to fatal receive error: host unreachable" error. it stays alive but no response for after dns queries. then I need to restart it manually to make it responsive(I put a task for this issue from windows). I cant use microsoft windows dns server because I am using windows 2008 server web edition which does not include that. so my question is what are the other solutions you use for dns server in windows ?

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• How can I copy the output from a remote command into the local clipboard?

  - by cwd

  I use iTerm2 as my terminal client in Mac OS X. On the local system I can use pbcopy and pbpaste to transfer data between the system clipboard and the terminal, but of course this doesn't work when you're ssh'ed to another machine. Is there some way which I can take the result of a command and copy it to the clipboard automatically? Perhaps an applescript to grab the text on the iTerm windows, then get the next to last line? For instance, if I wanted to copy the current working directory: I run pwd, then use the mouse to select the text, and then press command + c. Is there any better / faster / automatic way of doing this? I'm not looking for a bulletproof solution that would work for every command (eg: might not work when there is a huge scrollback) - I'm just looking for something to make this task that I do quite often a little less tedious. Update I'm looking into using screen to do this, but I'm still not sure if it is possible.

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• Cannot Expand/Collapse tasks in Microsoft Project 2010

  - by Dean

  I opened an existing Microsoft Project file today and was unable to expand/collapse the subtasks use the cursor and the '+/-' signs beside the parent tasks. I am able to expand and collapse using the 'View-Outline' ribbon icon. However when I attempt to do this using the mouse on specific tasks, my cursor will not perform the task. My cursor is a 'white cross' when I need it to be an 'arrow'. I'm assuming this is something minor that I'm missing. Any assistance appreciated. Thanks

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• Obtaining list of files from php script?

  - by SenorSputnik

  Naenara/KCCKP offers a catalog of hundreds of mp3 files that can only be downloaded in small amounts at a time. Clicking on a song title invokes mp3player.php and downloads a plaintext link to the mp3 file: http://www.kcckp.net/mp3player.php?e+8 Going directly to mp3player.php will display Korean error messages and send you back 1 page in your history. Is there any way to parse/coax mp3player.php into dumping a full list of mp3 links? I am sorry if this is a painfully easy or impossible task, I have not even begun to delve into php. </newbiewhining>

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• PHP hits 100% CPU and eats RAM at the same time Monday to Friday

  - by Daniel Samuels

  We run a learning platform for primary schools here in the UK and it's all been running extremely well. However at around 4PM Monday to Friday we see the same issue arise -- 1-2 PHP threads will spike to 100% CPU and gradually start eating up RAM until the server(s) fall over. 98%+ of our requests are HTTPS, these come into our Layer 7 load balancer which then decrypts the SSL data, adds the X-HTTP-Forwarded-For header and forwards the data onto an application server (we have 2 of those at the moment) on port 80. Our application servers have Varnish on port 80 which takes in the request from the load balancer and passes the request through to Nginx on port 81. Nginx then works out which 'vhost' it needs to use and passes any PHP processing through to PHP-CGI which is listening on a socket (managed through spawn-fcgi). There's an instance of Memcached running too, MySQL runs on a separate server / slave setup. Throughout the day the load will typically go no higher than 0.8 on either of the application servers, however at around 4PM our problem arises. I've managed to run strace on a few of the actual threads when they cause the problem and I always see the same thing: stat("/usr/share/zoneinfo/Europe/London", {st_mode=S_IFREG|0644,st_size=3661, ...}) = 0 stat("/usr/share/zoneinfo/Europe/London", {st_mode=S_IFREG|0644,st_size=3661, ...}) = 0 This is repeated infinitely and never stops until you SEGKILL the process or oomkiller kills it. There are no cron jobs scheduled to run at that time and I don't have any way of seeing exactly what Nginx request is associated with the PHP process which is running. We are running PHP 5.3.14 which we upgraded to from 5.3.8 last week to rule out the older version being the problem. This issue has been going on a few months now and we have no idea what is causing it. We deploy our software very frequently, so it's difficult to track down a specific release which may have started the problem - especially as we do not know the date of the first occurrence of this issue. Varnish is version 3.0.1, Nginx is 1.0.6 (which I understand is about a year old now), our servers are running CentOS release 5.7 (Final) they have Intel i3 540s at 3.07Ghz and 8GB of RAM. There's a discussion on the Debian mailing list about something very similar, you can find that here. Has anyone seen anything like this in the past, does anyone have any ideas or suggestions? Are there a way of linking an Nginx request directly to a PHP thread? Is there a better way of seeing what the PHP process is doing? (I've seen GDB mentioned, though I'll have to recompile PHP) Thanks!

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• Switch flooding when bonding interfaces in Linux

  - by John Philips

  +--------+ | Host A | +----+---+ | eth0 (AA:AA:AA:AA:AA:AA) | | +----+-----+ | Switch 1 | (layer2/3) +----+-----+ | +----+-----+ | Switch 2 | +----+-----+ | +----------+----------+ +-------------------------+ Switch 3 +-------------------------+ | +----+-----------+----+ | | | | | | | | | | eth0 (B0:B0:B0:B0:B0:B0) | | eth4 (B4:B4:B4:B4:B4:B4) | | +----+-----------+----+ | | | Host B | | | +----+-----------+----+ | | eth1 (B1:B1:B1:B1:B1:B1) | | eth5 (B5:B5:B5:B5:B5:B5) | | | | | | | | | +------------------------------+ +------------------------------+ Topology overview Host A has a single NIC. Host B has four NICs which are bonded using the balance-alb mode. Both hosts run RHEL 6.0, and both are on the same IPv4 subnet. Traffic analysis Host A is sending data to Host B using some SQL database application. Traffic from Host A to Host B: The source int/MAC is eth0/AA:AA:AA:AA:AA:AA, the destination int/MAC is eth5/B5:B5:B5:B5:B5:B5. Traffic from Host B to Host A: The source int/MAC is eth0/B0:B0:B0:B0:B0:B0, the destination int/MAC is eth0/AA:AA:AA:AA:AA:AA. Once the TCP connection has been established, Host B sends no further frames out eth5. The MAC address of eth5 expires from the bridge tables of both Switch 1 & Switch 2. Switch 1 continues to receive frames from Host A which are destined for B5:B5:B5:B5:B5:B5. Because Switch 1 and Switch 2 no longer have bridge table entries for B5:B5:B5:B5:B5:B5, they flood the frames out all ports on the same VLAN (except for the one it came in on, of course). Reproduce If you ping Host B from a workstation which is connected to either Switch 1 or 2, B5:B5:B5:B5:B5:B5 re-enters the bridge tables and the flooding stops. After five minutes (the default bridge table timeout), flooding resumes. Question It is clear that on Host B, frames arrive on eth5 and exit out eth0. This seems ok as that's what the Linux bonding algorithm is designed to do - balance incoming and outgoing traffic. But since the switch stops receiving frames with the source MAC of eth5, it gets timed out of the bridge table, resulting in flooding. Is this normal? Why aren't any more frames originating from eth5? Is it because there is simply no other traffic going on (the only connection is a single large data transfer from Host A)? I've researched this for a long time and haven't found an answer. Documentation states that no switch changes are necessary when using mode 6 of the Linux interface bonding (balance-alb). Is this behavior occurring because Host B doesn't send any further packets out of eth5, whereas in normal circumstances it's expected that it would? One solution is to setup a cron job which pings Host B to keep the bridge table entries from timing out, but that seems like a dirty hack.

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